Texturing a makehuman mesh after sculpt
I am going to risk some down votes and be harsh but honest with you. But this is how I would answer this to a friend. I think the mistake is that you are rushing too much. I would recommend taking it slower. MakeHuman is a great tool, but it is not magic, you cannot skip learning the basics of 3d before using it. My honest recommendation would be to forget about this for now and to spend a bit more time learning more about modelling, UV mapping, textures and materials, functions and workflows of the software. Maybe try modeling a simple face without too much detail from scratch, learn to UV unwrap it and make a basic texture and material for it yourself. It doesn't need to be perfect, but you will get a better understanding on what you can and cannot do with the software during this experience. Do not be afraid to do and redo and redo and redo the same things again and again until you get them right. Recognize when it is frustrating and know that frustration can be a part of this process and is OK. It usually means that you are learning. 

At the moment the problem would be hard to fix for an experienced 3d artist. This is the point where one should start from the beginning and concentrate on doing it right from the start instead of trying to fix it. I am not trying to be rude here - everything is fine with the situation, it happens, not a big deal.